The present invention provides a method, system and device for computing equivalent load time, load balancing method, system and device, and a base station. The method for computing equivalent load time comprises: acquiring channel quality information corresponding to one component carrier; determining a downlink transmission rate of one radio bearer of the component carrier according to the channel quality information of the component carrier; acquiring a remaining service data packet length corresponding to the radio bearer, wherein the remaining service data packet length is a service data length to be in downlink transmission; determining a specific value by using the remaining service data packet length as a denominator and the downlink transmission rate as a numerator; and determining, according the specific values of all radio bearers, the equivalent load time of the component carrier. The technical solution of the present invention accurately reflects an actual load of a member carrier, thereby increa
